<template>
  <div class="add-role">
    <main class="add-main">
      <div class="step-container">
        <el-steps direction="vertical" :active="activeStep">
          <el-step title="角色信息" />
          <el-step title="权限信息" />
          <el-step title="检查并完成" />
        </el-steps>
      </div>
      <div v-if="activeStep === 1" class="form-container">
        <div class="form">
          <el-form ref="roleForm" class="form-box" :model="roleForm" :rules="roleRules">
            <el-form-item label="角色名称" prop="roleName">
              <el-input v-model="roleForm.roleName" />
            </el-form-item>
            <el-form-item label="角色描述">
              <el-input v-model="roleForm.remark" />
            </el-form-item>
          </el-form>
        </div>
      </div>
      <div v-if="activeStep === 2" class="form-container">
        <div class="tree-wrapper">
          <div v-for="item in treeList" :key="item.id" class="tree-item">
            <div class="tree-title">{{ item.title }}</div>
            <el-tree
              ref="tree"
              :data="item.children"
              show-checkbox
              default-expand-all
              node-key="id"
              highlight-current
              :props="defaultProps"
            />
          </div>
        </div>
      </div>
      <div v-if="activeStep === 3" class="form-container">
        <div class="title">检查并完成</div>
        <div class="form">
          <div class="info">
            <div class="form-item">角色名称：{{ roleForm.roleName }}</div>
            <div class="form-item">角色描述：{{ roleForm.remark }}</div>
            <div class="form-item">角色权限：</div>
            <div class="tree-wrapper">
              <div v-for="item in disabledTree" :key="item.id" class="tree-item">
                <div class="tree-title">{{ item.title }}</div>
                <el-tree
                  ref="disabledTree"
                  :data="[...item]"
                  show-checkbox
                  default-expand-all
                  node-key="id"
                  :highlight-current="false"
                  :props="defaultProps"
                />
              </div>
            </div>
          </div>
        </div>
      </div>
    </main>
    <footer class="add-footer">
      <div class="btn-container">
        <el-button v-if="activeStep > 1" @click="decreseStep">上一步</el-button>
        <el-button v-if="activeStep < 3" type="primary" @click="increseStep">下一步</el-button>
        <el-button v-if="activeStep === 3" type="primary" @click="confirmBtn">确认添加</el-button>
      </div>
    </footer>
  </div>
</template>
<script>
import { addRole, editRole, getFunction, getRoleDetail } from '@/api/role'
import { treeToDisabled } from '@/api/treeToDisabled'

export default {
  data() {
    return {
      activeStep: 1,
      roleForm: {
        roleName: '',
        remark: ''
      },
      roleRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ]
      },
      treeList: [],
      disabledTree: [],
      defaultProps: {
        children: 'children',
        label: 'title'
      },
      perms: [],
      needValidate: false
    }
  },
  computed: {
    id() {
      return this.$route.query.id
    }
  },
  created() {
    this.getFunctionList()
    if (this.$route.query.id) {
      this.getDetail()
    }
  },
  methods: {
    decreseStep() {
      if (this.activeStep === 1) return
      this.activeStep--
    },
    // 编辑回显数据
    async getDetail() {
      // eslint-disable-next-line no-unused-vars
      const { data: { perms, userTotal, ...roleForm }} = await getRoleDetail(this.id)
      console.log('@', this.perms)

      this.perms = perms
      this.roleForm = roleForm
    },
    increseStep() {
      if (this.activeStep === 3) return
      if (this.activeStep === 1) {
        // 当前是角色信息状态，进行表单校验
        this.$refs.roleForm.validate(valid => {
          if (valid) {
            // 校验通过才能进入下一个状态
            this.activeStep++
          }
        })
      }
      if (this.activeStep === 2) {
        // console.log(this.$refs.tree)

        // 编辑回显
        if (this.id) {
          this.$nextTick(() => {
            this.$refs.tree.forEach((item, index) => {
              item.setCheckedKeys(this.perms[index])
            })
          })
        }

        // 首次进入步骤2时先不做处理
        if (this.needValidate) {
          this.perms = []
          this.$refs.tree.forEach((item, index) => {
            this.perms[index] = item.getCheckedKeys()
          })
          // 如果长度为零 没有选中任何东西
          if (this.perms.flat().length === 0) {
            this.$message({
              type: 'error',
              message: '请至少选择一个权限点'
            })
          } else {
          // 进入到下一页
            // this.roleForm.perms = this.perms.flat()
            this.roleForm.perms = this.perms
            this.disabledTree = this.treeList
            treeToDisabled(this.disabledTree)
            this.activeStep++

            // activeStep发生变化，触发Dom更新后，回显数据
            this.$nextTick(() => {
              // console.log(this.$refs.disabledTree)
              this.$refs.disabledTree.forEach((item, index) => {
                item.setCheckedKeys(this.perms[index])
              })
            })
          }
          // console.log(this.perms.flat())
        }
        this.needValidate = true
      }
    },
    // 获取功能列表
    async getFunctionList() {
      const { data } = await getFunction()
      this.treeList = data
      // 给功能列表每一项添加disabled禁用
    },
    async confirmBtn() {
      if (this.id) {
        this.roleForm.perms = this.perms
        await editRole(this.roleForm)
        this.$message({
          type: 'success',
          message: '编辑角色成功'
        })
      } else {
        await addRole(this.roleForm)
        this.$message({
          type: 'success',
          message: '添加角色成功'
        })
      }
      this.perms = []
      this.roleForm = {
        roleName: '',
        remark: ''
      }
      this.$router.back()
    }
  }

}
</script>
  <style scoped lang="scss">
  .add-role {
    background-color: #f4f6f8;
    height: 100vh;

    .add-header {
      display: flex;
      justify-content: space-between;
      padding: 0 20px;
      height: 64px;
      line-height: 64px;
      font-size: 16px;
      font-weight: bold;
      background-color: #fff;

      .left {
        span {
          margin-right: 4px;
        }

        .arrow {
          cursor: pointer;
        }
      }

      .right {
        text-align: right;
      }
    }

    .add-main {
      position: fixed;
      top: 64px;
      bottom: 88px;
      width: 100%;
      overflow-y: auto;
      background: #f4f6f8;
      padding: 20px 230px;
      display: flex;
      .step-container {
        height: 400px;
        width: 200px;
      }
      .form-container {
        flex:1;
        background-color: #fff;
        overflow-y: auto;
        .title {
          height: 60px;
          line-height: 60px;
          padding-left: 20px;
        }
        .form {
          margin-bottom: 20px;
          padding: 20px 65px 24px;
          .el-form {
            display: flex;
            flex-wrap: wrap;
          }
          .info{
            font-size:14px;
            color:#666;
            .form-item{
              margin-bottom:20px;
            }
          }
        }
        .form-box{
          width: 600px;
          display: flex;
          flex-direction: column;
        }
      }
    }

    .add-footer {
      position: fixed;
      bottom: 0;
      width: 100%;
      padding: 24px 50px;
      color: #000000d9;
      font-size: 14px;
      background: #fff;
      text-align: center;
      z-index: 10001;
    }
    .tree-wrapper {
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
        .tree-item {
          flex: 1;
          padding: 0px 4px;
          text-align: center;
          .tree-title {
            background: #f5f7fa;
            text-align: center;
            padding: 10px 0;
            margin-bottom: 12px;
          }
        }
      }
  }
  </style>
